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Old 05-11-10, 02:38 PM   #1
BrooklynBikeGir
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Powder coating problem--blistered decals

So I took a frame to get powdercoated with just a clear coat. I showed the frame to the guy (who does a lot of bikes) beforehand and he told me he could do it. But I just picked it up and the decal blistered under the clear powder coat. I'm not sure how to fix this. I was originally going to repaint (or, repowdercoat) the entire frame, so I had some decals custom-made already. But I can't put them over the old decal b/c the lettering of the frame name is an open type font so the frame color is supposed to show through the body of the lettering, which is now the blistered area. Any suggestions? Get a new decal made with a gold background instead of clear and hope that the decal guy can match the frame color from a photo?

See attached before and after photo for clarification. Edited to clarify: The first photo is actually the "after" photo and the second one is the "before."
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File Type: jpg Nolan..JPG (57.7 KB, 32 views)
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Old 05-11-10, 03:22 PM   #2
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The decal probably got cooked- powder coat needs to be baked after spraying, and the decal couldn't stand the heat. If you want to do clear over a decal, you can't use powder coat.
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Old 05-11-10, 03:31 PM   #3
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I seem to remember talk of powder coating safe decals...special made so they won't be affected by the heat I think?
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Old 05-11-10, 04:11 PM   #4
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Did the powdercoater put a clear powdercoat over a painted finish? If he did, then I would be surprised if the paint didn't blister as well.
As cycle_maven says, you can't put powdercoat over either decals or paint. With regard to powdercoat-friendly decals, it can be done, but it requires special decals and a lower temperature powdercoating process which few powdercoaters would be capable or willing to do.
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Old 05-11-10, 04:20 PM   #5
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If the frame had been properly prepared (IE mediablasted) before hand, this wouldn't be an issue.
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Old 05-11-10, 04:43 PM   #6
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If the frame had been properly prepared (IE mediablasted) before hand, this wouldn't be an issue.
Well, the OP apparently wanted just a protective clear coating over the original paint and the decals weren't up to taking the curing temperature. Now, I believe he's into a complete strip/repaint/powdercoat of the entire frame unless he can find a way to hide the damaged area.
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Old 05-11-10, 05:02 PM   #7
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Full re-decal and refinishing job seems to be the only sure-fire solution to this unsuccessful PC job.
Just wondering if the powder coater knew what they were doing in the first place. Kinda sad for all parties when things like this don't work out. Hope you get it all figured out and fixed soon!

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Old 05-11-10, 07:00 PM   #8
BrooklynBikeGir
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Now, I believe he's into a complete strip/repaint/powdercoat of the entire frame unless he can find a way to hide the damaged area.
Correct. I'm looking for suggestions as to how I might hide the damaged area. I don't want to strip and repowdercoat at this point.
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Old 05-11-10, 07:46 PM   #9
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Sand down the damaged area so that it's flat and blended into the surroundings. Find a can of spray-paint that matches and spray just that area.
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